1590A
Optical BypassVerified
Based on the Optical Bypass
From the post
Here's another alternative to the 3PDT for bypass wiring. It's based on the method VooDoo Lab uses for bypass and uses a optocoupler to achieve true bypass using a DPDT. I've drawn up 2 different layouts for this: a standard perf/PCB layout, as well as another PCB I did in Eagle with the footswitch board mounted. There are extra pads so the compact or the larger DPDT footswitch can be used, as well as an extra pad for the resistor so 1/8th or 1/4th watt can be used.
Note, in the board mounted footswitch version In/Out pads refer to the jacks, and Send/Return refer to the effect in/out.
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.
Parts list 4 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 1 | ||||
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| Capacitors 1 | ||||
| ×1 | 220nF | 220n | read from the layout by eye | |
| Opto 1 | ||||
| IC1 | H11F1 | H11F1 | photo-FET optocoupler; read from the layout by eye | |
| LEDs 1 | ||||
| ×1 | LED | LED | indicator soldered to the board, drawn red, type not given; read from the layout by eye | |